Activation/Deactivation Phenomena in the Electrochemical Reduction of Nitric oxide and Oxygen on LSM perovskites

Research output: Contribution to journalJournal article – Annual report year: 2018Researchpeer-review

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Activation/Deactivation Phenomena in the Electrochemical Reduction of Nitric oxide and Oxygen on LSM perovskites. / Kammer Hansen, K.

In: International Journal of Electrochemical Science, Vol. 13, No. 5, 2018, p. 4782-4791.

Research output: Contribution to journalJournal article – Annual report year: 2018Researchpeer-review

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@article{38e0f4f99e8746aaa33e8920fa5d726f,
title = "Activation/Deactivation Phenomena in the Electrochemical Reduction of Nitric oxide and Oxygen on LSM perovskites",
abstract = "The effect of anodic pretreatment on LaMnO3+delta, La0.85Sr0.15MnO3+delta and La0.5Sr0.5MnO3 point electrodes were investigated using cyclic voltammetry in the temperature range 200 to 400 degrees C in either 10{\%} oxygen in argon or 1{\%} nitric oxide in argon. The electrodes, in most cases, were deactivated in oxygen-containing gas and activated in nitric oxide-containing gas after anodic polarization. This was thought to be due to potential-induced SrO segregation to the surface of the electrodes and annihilation of oxygen vacancies. This work shows that the effect in some cases is significant and must be considered when evaluating the electrodes. In addition, the activity of the electrodes increases with increasing strontium content with respect to the reduction of both oxygen and nitric oxide. The electrodes were all more active with respect to the reduction of nitric oxide than with respect to the reduction of oxygen in the investigated temperature range.",
keywords = "LSM, NO, O2, Activation, Deactivation",
author = "{Kammer Hansen}, K.",
year = "2018",
doi = "10.20964/2018.05.61",
language = "English",
volume = "13",
pages = "4782--4791",
journal = "International Journal of Electrochemical Science",
issn = "1452-3981",
publisher = "Electrochemical Science Group",
number = "5",

}

RIS

TY - JOUR

T1 - Activation/Deactivation Phenomena in the Electrochemical Reduction of Nitric oxide and Oxygen on LSM perovskites

AU - Kammer Hansen, K.

PY - 2018

Y1 - 2018

N2 - The effect of anodic pretreatment on LaMnO3+delta, La0.85Sr0.15MnO3+delta and La0.5Sr0.5MnO3 point electrodes were investigated using cyclic voltammetry in the temperature range 200 to 400 degrees C in either 10% oxygen in argon or 1% nitric oxide in argon. The electrodes, in most cases, were deactivated in oxygen-containing gas and activated in nitric oxide-containing gas after anodic polarization. This was thought to be due to potential-induced SrO segregation to the surface of the electrodes and annihilation of oxygen vacancies. This work shows that the effect in some cases is significant and must be considered when evaluating the electrodes. In addition, the activity of the electrodes increases with increasing strontium content with respect to the reduction of both oxygen and nitric oxide. The electrodes were all more active with respect to the reduction of nitric oxide than with respect to the reduction of oxygen in the investigated temperature range.

AB - The effect of anodic pretreatment on LaMnO3+delta, La0.85Sr0.15MnO3+delta and La0.5Sr0.5MnO3 point electrodes were investigated using cyclic voltammetry in the temperature range 200 to 400 degrees C in either 10% oxygen in argon or 1% nitric oxide in argon. The electrodes, in most cases, were deactivated in oxygen-containing gas and activated in nitric oxide-containing gas after anodic polarization. This was thought to be due to potential-induced SrO segregation to the surface of the electrodes and annihilation of oxygen vacancies. This work shows that the effect in some cases is significant and must be considered when evaluating the electrodes. In addition, the activity of the electrodes increases with increasing strontium content with respect to the reduction of both oxygen and nitric oxide. The electrodes were all more active with respect to the reduction of nitric oxide than with respect to the reduction of oxygen in the investigated temperature range.

KW - LSM

KW - NO

KW - O2

KW - Activation

KW - Deactivation

U2 - 10.20964/2018.05.61

DO - 10.20964/2018.05.61

M3 - Journal article

VL - 13

SP - 4782

EP - 4791

JO - International Journal of Electrochemical Science

JF - International Journal of Electrochemical Science

SN - 1452-3981

IS - 5

ER -